Stay-bolt structure.



B. E. D. STAFFORD @L E. I. DODDS.

l STAY BOLT STRUCTURE.

APPLICATION msn Nov. 21. 191s.

1,252,310. Patented Jan. 1,1918.

iiiimmlm UNITED STATES?v PATENT .()FFICEg- BENJAMIN ELDL STAFFORD AANI)ETI-IAN I." DODDS, 0F PITTSBURGH; 1EENNSYIVALNIAi,l ASSIGNOIRS'TOJFLANNERY' BOLT.' COMPANY, O F PITTSBURGH, PENNSYLVANIA;

STAY-BOLT STRUCTURE.

Specification of Letters Patent.

Patented Jaa-1; 191s.;

Application le'd November 21, 1916.. y Serial No. 132,596.

To all whom it'may concern:

Be it known that we, BENJAMIN E. D. STAFroRD and ETHAN I. DoDs,`citizens of the United States, and residents of vPittsburgh, in thecounty of'tAllegheny and State ofIennsylvania, have invented certain newand useful Improvements in Stay Bolt Structures; and we do herebydeclare the following to be a full, clear, `and exact description of theinvention, suchas will enable others skilled in the art 'to whichitappertains to make and use the same.

rlfhis invention relatesl to stay bolt vstructures, and moreparticularly to means to faeilitate the testing of the bolt,-the` objectof the invention being to provide', in a, stay bolt structure, simplemechanicalimeans which may be manually. operated `without removing anypart ofthe structure, to determine whether the bolt is defective.

IVith this object in View, zthe inventionv consists in certain novelfeatures of construc-V tion and combinations of parts as hereinafter setforthiand pointed out 1in' the claims.

In the accompanying drawings, Figure 1 is a sectional view showing astay bolt strucf ture embodying our.improvements;.Fi'g. 2 is a plan viewof the same; vFig is a-'plan view of the cap; Fig. 4 is a side'view ofthe rotary .driving or testing member; Fig. 5` is a top plan view ofsaid driving or testing:

member; Fig. 6 is a bottom or inner plan view of said driving or testingmember; Fig. 7 is an end view of the bolt head; Fig. 8 is a sectionalview showing another form of the invention; Fig. 9 is a plan view of thestructure shown in Fig. 8, and Figs. 10, 11, and 12 are views of detailsof the structure shown in Fig. 8.

1 represents a bearing sleeve threaded externally at 2 to screw into anouter boiler sheen-the outer portion of said sleeve being somewhatenlarged and threaded as at 3 for a purpose hereinafter explained. Thesleeve 1 is made interiorly with a curved bearing for the partlyspherical head 4 of a stay-bolt 5, and the inner portion 6 of the boreof the sleeve is made flaring to permit lateral play of the bolt. Thebolt head is provided with an angular enlargement 7 for a purposehereinafter explained.

The threaded portion 3 of the sleeve 1 reeeives the interiorly threadedportion ofa cap 8. Between a shoulder 9 within said cap andthe outerend'ofthe sleeve 1, the annular 55 flange 10 of a rotary driving ortesting member 1l is disposed, suitable packing 12 being preferablydisposedbetween said flange and sleeve. Thev rotary testinghmember. isrecessed or made hollow and its bottom wall 13 'which' enters the outerend of the sleeve` 1, is made with an angular opening 14 which jreceives the angular enlargement 7 on the bolt `head,--said opening 14being of such proportions relatively-to' the proportions of' 65 theenlargement 7 y.ias not to interfere with the normal lateral playl ofthe bolt.

The rotary testing member 11is provided with an outwardlyprojecting'angular enflarg'ement 15. to receive a wrench. Theenlargement 15`0f the rotary testing member is Y inclosed 'and protected-within the outer p ortion of the cap 8', and this portion ofthe capvmay be made angular exteriorlyto receive al wrench.

The cap 8 may be so adjusted normally, asv to retain therotarytestingmember tightly, clamped yin place, but when the bolt is tobe v tested, the attendant may lessen the capjS, and'then apply a wrenchto the angular enlargement 15 on the testing member and at. tempt toturnthe latter. If the memberlll` refuses to turn more than may benecessaryf to take up thepIay between .the ,wallsof the., opening 14 andthe angular enlargement 7'"85 on the bolt head, the attendant will knowthat the bolt is in good condition. If however, the testing memberresponds freely (or comparatively so) to the turning force applied bythe wrench, the attendant will thus be made aware of the fact that thebolt is broken.

In the embodiment of the invention shown in Figs. 8 to 11, the bearingsleeve 1 is threaded interiorly, as at 16 to receive the 95 externalthreads of a cap 17 inclosed within said bearing sleeve. rIhis internalcap may rest against a shoulder 18 formed within the bearing sleeve, andsaid cap is formed with an opening having a beveled wall 19 form- 100ing a. seat for the beveled peripheral portion of a rotary testingmember 20. This testing member is made with an angular socket 21 whichreceives the angular enlargement 7 on the bolt head 4.

The outer' part of the rotary testing member is made angular as shown at23 to receive a Wrench. A collar 24 is threaded on the shank 22 andbears on'an annular bead 25 surrounding the seat 19. This collar may bemade with slots 26 to receive a WrenchV andythe cap l7 may also be madewith Wrenclislots 27. Y .1

We do not claim broadly, in this case, a testing member to engage thebolt and mounted to be turned to test the integrity of the bolt, thesame being covered in our copending application Serial N o. 83,146, nor

ldo we claim broadly in this case, the testing vlm emberhaving a partdisposed Within the Letters-Patent, is

upies of this patent nu; be obtained for Having fully described ourinventionv what We claim as newl and desire to secure by 1. In a staybolt structure, the combination with a bolt having an angular portion atone end, and a bearingsleeve, of a rotatable testing member supported bythe bearing sleeve and having an angular socket to receiveVr the angularend 'portion of the bolt.

' 2. In astay bolt structure, the combination with' a sleeve and a bolthaving a bearing therein, said bolt'provided With a pro` jecting angularend portion, ofa rotatable testing member supported by the sleeve andyhaving 'an angular socket to receive the anguiar portion of thev bolt,said socket having slightly greater dimensions than the dimensions of'said angular projecting portion of the bolt.

3. In a stay bolt structure, the combination with a bearing sleeve,abolt ha-ving'a' bearingvinsaid sleeve and provided with an angularenlargement and a cap removably attached' to said sleeve, of a rotatabletesting member mounted Within the cap and having anangular socket toreceive the angular `en.-`

largement o11 the bolt.V i

4. In a 'stay boltv structure, the combination with a bearingsleeve, abolt mounted therein and having an angular enlargement and a capremovably attached .to said sleeve, of a rotatablev testing memberWithin said cap and having an angular socket to receive the angularenlargement on the bolt, said l testing member having an langularportion inclosed Within a part of the stay bolt structure. l f

5. In a lstay bolt structure, the combination With a bearing sleeve, abolt having a bearing in said sleeve and provided with an angularenlargement, 'and a cap removably attached to said sleeve, of arotatable testing member having an angular socket to receive the angularenlargement on the bolt, and Y also having a peripheral flange disposedbe.-

tween the cap and thesleeve, said testing member also having an angularprojection inclosed within saidcap.

In testimony whereof, We have signed this specification in the presenceoftwo subscribing Witnesses.

BENJAMIN E. D. STAFFORD.

ETHAN I. DODDS. Y v Witnesses: l

EDWIN SPENCER RYCE,

F'. H. ALLisoN.'

ve cents each, by addressing the"Commissoner of Patents, Washington, D.C.

